Sand-trap.



'UNITED enanas PATENT onirica.

PATRICK CALLAIAN, 0F BGSTGN-Y MASSACHUSETTS.

sama-raar.

specification or Letters raient.

Application ed @gaat 3, 1912. Serial No. 713,165.

Patented Aug. 19,1913.

To all 'whom it may concern.'

a citizen ofthe United States, residing at Boston, inthe county of Suffolk and :State of Massachusetts, have-invented certain new. and useful Improvements in Sand-Traps, of:

which the following is a specification, reference being had to the accompanying drawings.

in .traps used 1n drain-pipes of buildings and in the drains which lead to thecitysewers; and an object of this invention-is the pro-- vision ina trap of the character referred to of means for allowing the free escape of gasolene vapor and the vapors of like volatile substances, which vapors might otheruse and probably would accumulate in the:

drains and drain-pipes 1n such quantity as ,toforrn with the air and other gases present; therein an explosive mixture. Indeed, thei l yordinances of some cities now 4require that the owners' nand operators of garages and like places shall clean the solene out of the drains', because of Vthe 1i elihood of theI iasolene forming an explosive. mixture asV just described.. By means of the present in-' vention the` necessity for such 'cleaning' (which is very laborious and expensive) is wholly removed.

Another object of this invention is the provision ina trap of the character above mentioned of means for arresting and collecting the sand which is washed into the drainand would otherwise probably accumulate in sucl1 quantity as to choke up the sewer, such traps being particularly useful in garages where a large amount of san' flows away with the water used in washing the automobiles.

A thrtrd object of this invention is to provide va sand-arresting'trap which will be `simple in construction, comparatively cheap in manufacture andfirstcostl of installation and efficient, reliable and,y durable in operation and use. f'

A fourth object vof this, invention is to provide a sand-arresting trap in which lthe Water-seal will be maintained unbroken during all the operations necessary in connection therewith, such as removing the vsand-oollecting pail or the` street-grating with its attached dip-pipe.

A fifth object of this invention is to pro-- i vide a trap which will at one and the same Be A1t known that I,- PAfrmcK CALLAHAN,i

will require ithe services of no -skilled mechanic, such as a plumber, but which will be susceptible of ready operation and cleanmg by the unskilled labor commonly em- This. invention relatesA to improvements' in traps and'particularly to improvements' ployed at garages and like places.

.In the drawings illustrating the prim' ciple yof this invention and the best mode now known to me of applynglthet principle,

Figure 14 tis`- a central vertlcal section through my new "trap and -the waste-pipe leadin therefrom; Fig. 2 is a pla-n view ofmy Inew4 the upper end or mouth ofthe sand-collecting pail e. Near its top the latter is formed with an outwardly-projecting flange or band f which rests, when the pail is in position, upon the inwardly-promoting flange or ledge g which is formed upon the interior of the shell a near the top thereof but below the grating b. The pail e is provided with a suitable bail or handle h and, just below its supporting flange or ring f it is further formed with a horizontal series of overiow holes z'. The inner free (or outlet) end of the dip-piped projects below this series of'holes z' and between the upper portion'of the pail e and the rdip-pipe l there is an air-space or chamber m ,which is infree communication with the outer air through the horizontal seriesA ot holes d formed in the top ofthe dip-pipe d and the holes b i'n the foraminated lid or streetgrating b. This grating rests upon the rim or casing a is fitted c of the pail e and the part of-the lid which forms the top of the chamber m is imperfe-4 rate and, therefore, closes the latter from* above. Vapor of gasolene or other volatile substance which flows into the drain tic will escape bv way of the holes z', (Z and b; if the' vapor rises from the liquid lying between the. pail c aud tile dip-pipe (l, it may promptly est-ape through the holes fl', 12'; while vapor rising from thc liquid within the dip-pipe (l will flow ydirectly upwardly and out through the holes o" inthe lid b. At its-.lwttom the shell orI casing i( is formed with a suitable outlet .7' in which fits the lower cud of a waste-pipe lc, which curves upwardly and extends horizontally away from the shell, as is shown in Fig. l.

The operation of the trap is as follows: rl`he waste-water enters through the holes b in theflid or grating b and is guided by the dip-pipe Z into the-I pail e, which thus receives the sand and other solid matter carried in suspension by the water. Since the discharge end of the dip-pipe projects well below the holes 1I iu the-paill e, the water which flows through the latter holes into the shell a will be free from the sand and other solid matter carried. in suspension, since the latter will settle in the lower part of the pail e. It is to be carefully observed that the sand which settles as a deposit in the pail is not forced therefrom but care is taken to retain the sand therein; that is, the pail or bucket c is a sand-collecting receptacle and the trap is a sand-arresting and sand-separating trap.V To remove the bucket c after it has become filled to the desired extent, it is necessary only to raise the grating Z by pulling upon the slidable handle b2,after which the bucket may be raised by means of its bail l1. and dumped and then replaced. It is to be noted that, when the bucket. is in position, it is so firmly set or fixed in position that it cannot be `inadvertently or accidentally displaced. In these operations of removing, dumping and replacing the bucket e, no skilled labor, such as that of a plumber, is needed; but the ordinary unskilled help commonly employed at garages will be found capable of doing this simple work. It is further to be carefully observed that the sewer-gas is kept out of the building at all times irrespective of whether the bucket be in place' or not; that is, the trap acts as an eliicicnt stench-trap as well as a sand-retaining trap. Why this is will be readily gathered from an iuspec tion of Fig. 1; the sealing water is at all times present and is of sutlicieutly great depth to constitute under all circumstances an eltici mt seal. Any gasolene or like volatile oil carried into the trap with the washwater will ioat upon the surface of the water in the trap and will evaporate and escape as vapor through the holes i, al and b', as hereinbefore explained, whereby the provided with a grating at its top and labor and expense of cleaning out the drains and sewers will bc obviated and the danger of an explosion due to the formation of a combustible mixturevof gasolenc vapor and air in the sewer is avoided. Since only that part of ghe cover b which lies above the dippipe l ,fis foraminated, allfthc water must enter the trap through the latter,.whereby` a-- substantially total separation and collection of the sand in and by the bucket c result/s. The wastc-pipe 7c lies wholly below the level or plane of the overflow holes i in the bucket e, from which it follows that no backflow of the water will take place through these holes and. they are always open for the backtiow orescape of the vapor' -which rises from the volatilehydrocarbon "il floating upon the-liquid in the shell or nox-like casing a.

I claim:

1. A sand collecting trap comprising a shell provided at its top with a perforated cover and an outlet Aat its bottom, a bucket mounted Within said shell and having its brim in close contact with said perforated cover, said bucket being formed with perfoi-ations near it-s'top to permit the How of water into the shell and thetlowlof vapor from the same, and a dip-pipe depending from said cover into the mouth of said bucket and formed with perforations near its upper end for the passage of vapor-.from the upper -part ofthe bucket into the dippipe and thence through the perforations in the cover intothe outer air, the perforations in the cover being all within the upper edge `of the dip-pipe and the remaining portion of the cover being imperforate.

2. A sand collecting trapcomprising a .shell provided at its top with a perforated cover and an outlet at its bottom, a bucket mounted Within said shell and having its brim in close contact with said perforated cover, said bucket being formed with perforations near its top to permit the flow of water into the shell andthe flow of vapor from the same, said bucket being of comparatively great depth and being thereby adapted to separate and retainv sand and other solid matter carried in suspension by the water entering the perforated cover, and

a dip-pipe depending from said cover lnto l the mouth of said bucket and formed with perforations neargije upper end for thepassage of vapor from the upper part of the bucket into the dip-pipe and thence through the perforations in the cover into the outer air` the perforations in the cover being all within the upper edge of the dip-pipe and the remaining portion of the cover being imperforate, and a waste pipe which extends upwardly from said outlet and which lies below the level ofthe perforations in said bucket. v

3. A sand-collecting trap having a shell formed with an outlet yat its bottom and with a flange which projects 'inwardly from its side-wall near the top thereof; a sand-colleetiiig pail which is suiieient-ly deep to separate and retain Sand and other solid mattencarried in suspension by tlie wzilei: entering through said grating' zuid which is formeel near ile uppei' eiifl with :iii out` Wardly-piojecting ange tl at rests upon the first-named flange and with ovei'ow holes below said flanges; e clip-pipe the lower end ofwliioh extends into the mouth of said pail below Said ovelow holes, and a waste- Apipe which extends upvvai'dly from. said out let; and 'which lies Wholly below the level of the holes in said pail.

Signed at Boston, Suffolk county, Mesem cliuset's, this thirty-first day of July, 1912, in the presence of the two undersigned Witmesses.

PATBCK CALLAHN.

lVi'tnesseS:

EDITH V. WVoLFE, JERoME J. FRESTJLNE. 

